reusing stock head bolts on 5.0?

Mach 1 · 02-08-2002, 08:31 PM

I have done this in the past with no problems, was just wondering what other thoughts were.

Are they supposed to be replaced?

7DMACH1 · 02-08-2002, 08:39 PM

Usually you only replace them if they are strech bolts which are used on aluminum heads. I don't think you should have to replace them. I put ported e7 heads on my car years ago and used the old bolts. RAY

fiveohpatrol · 02-08-2002, 09:08 PM

well, this is one of the many places that i wouldnt skimp on. theres no way to tell by the eye that the bolts are streached, and if they are, its a good way to blow a head gasket and you'll have to do the same thing all over again.

ARP head bolts are only like $40, good investment. I would reccomend that you get them if you want to have peace of mind about it.

PKRWUD · 02-08-2002, 09:20 PM

My engines always get new head bolts. It's a small price to pay.

Take care,
-Chris

drudis · 02-08-2002, 10:43 PM

Depending on the power level and compression level, I would make a judgement call.
I have been into my motors several time, always used same old bolts.

THIS time, I am going aluminum heads and S-trim, so its new ARP's for me!

Mach 1 · 02-09-2002, 02:18 AM

what about the intake manifold bolts? Waste of money? New arp's are like $25.00

PKRWUD · 02-09-2002, 03:13 AM

IMO, anything that makes the engine look better, while providing quality reassurance, is not a waste of money. That being said, it's usually my customers money that I'm spending. Still, I always try to install new bolts where ever possible. It's difficult to tell a bolts strengths and weaknesses by sight, touch and feel. I figure metal is weakened, over time, by being subjected to extreme temp. changes. Engine bolts, for their size, are very much subjected to this, as well as the torquing of how many others? Chris, if I could, I'd buy you an ARP engine kit, but I can't quite afford that this week (Winter Nats on Sunday!!). If it was a small block Chevy for your sisters Caprice wagon, I'd say keep the old bolts, but for your 'stang, I'd go with new ARP's where ever you can. The 12pt SS bolts not only look great, but they make adjustments in tight quarters much easier. Plus, once you buy ARP's, you won't have to have this concern again in the future.
Take care,
-Chris

PKRWUD · 02-09-2002, 03:17 AM

Actually, now that I think about it, a customer/friend of mine who's wife works locally at ARP, owes me several big favors.

Hmmmm.

Mach 1 · 02-09-2002, 04:40 AM

lol....well, if you can score some bolt sets, I would make it worth your while...let me know...

PKRWUD · 02-09-2002, 05:54 AM

I'll make a phone call this afternoon. Remind me if I don't mention it later.

Take care,
-Chris

1BAD89 · 02-10-2002, 02:12 AM

The stock head bolts are 1 time use only. They should not be reused after they have been removed. This is straight from ford. You "could" use them, but you "could" also change your oil at 20k intervals.

PKRWUD · 02-10-2002, 03:45 AM

Dangit! I forgot to make a phone call.

MiracleMax · 02-10-2002, 10:50 AM

Yeah I agree, head bolts are cheap, so why not replace them, seems to me the factory bolts now are all torque to yield so they are one shot throw aways.

whiterod · 02-11-2002, 01:47 PM

mach 1, my friend and i did an aluminum head swap on his car and reused the same head bolts after we finished he drove it to normal operating temp and went back and retorqued the head bolts there was a slight movement in his bolts. next i performed an aluminum head swap on my car but i used arp head bolts. when i went back to retorque the bolts there was absolutely no movement. He never had problems with his and i never had any with mine since the head swap but i think the fact that there was no movement is just enough cause to replace them, it definately couldn't hurt.

Mach 1 · 02-11-2002, 02:11 PM

Quote:

Originally posted by whiterod
mach 1, my friend and i did an aluminum head swap on his car and reused the same head bolts after we finished he drove it to normal operating temp and went back and retorqued the head bolts there was a slight movement in his bolts. next i performed an aluminum head swap on my car but i used arp head bolts. when i went back to retorque the bolts there was absolutely no movement. He never had problems with his and i never had any with mine since the head swap but i think the fact that there was no movement is just enough cause to replace them, it definately couldn't hurt.

Interesting, and the kind of information I was looking for, thanks...

02-08-2002, 08:31 PM	#1
Mach 1 Registered Member Join Date: May 1999 Location: Georgia Posts: 3,866	reusing stock head bolts on 5.0? I have done this in the past with no problems, was just wondering what other thoughts were. Are they supposed to be replaced? __________________ 2002 GT 1993 GT (SOLD) '93 Mustang GT RHC member #142

02-08-2002, 08:39 PM	#2
7DMACH1 Registered Member Join Date: Nov 2001 Location: PHILA. PA USA Posts: 469	Usually you only replace them if they are strech bolts which are used on aluminum heads. I don't think you should have to replace them. I put ported e7 heads on my car years ago and used the old bolts. RAY __________________ Your Way Network VIDEOS www.yourwayvideo.com

02-08-2002, 09:08 PM	#3
fiveohpatrol I'd rather be basketweaving Join Date: Feb 2000 Location: Indianapolis Posts: 2,551	well, this is one of the many places that i wouldnt skimp on. theres no way to tell by the eye that the bolts are streached, and if they are, its a good way to blow a head gasket and you'll have to do the same thing all over again. ARP head bolts are only like $40, good investment. I would reccomend that you get them if you want to have peace of mind about it. __________________ NMRA O/C 9516 NA pumpgas stickshift 347 10.65@125.6, 6.73@100, 1.41 60ft

02-08-2002, 09:20 PM	#4
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	My engines always get new head bolts. It's a small price to pay. Take care, -Chris __________________ Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local RED & WHITE!

02-08-2002, 10:43 PM	#5
drudis Moderator Join Date: Dec 1999 Location: Livonia, MI, USA Posts: 1,194	Depending on the power level and compression level, I would make a judgement call. I have been into my motors several time, always used same old bolts. THIS time, I am going aluminum heads and S-trim, so its new ARP's for me! __________________ Darius Rudis, Moderator Corner Carvers Delight 1989 Mustang LX - Open Track Car http://www.dariusrudis.com

02-09-2002, 02:18 AM	#6
Mach 1 Registered Member Join Date: May 1999 Location: Georgia Posts: 3,866	what about the intake manifold bolts? Waste of money? New arp's are like $25.00 __________________ 2002 GT 1993 GT (SOLD) '93 Mustang GT RHC member #142

02-09-2002, 03:13 AM	#7
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	IMO, anything that makes the engine look better, while providing quality reassurance, is not a waste of money. That being said, it's usually my customers money that I'm spending. Still, I always try to install new bolts where ever possible. It's difficult to tell a bolts strengths and weaknesses by sight, touch and feel. I figure metal is weakened, over time, by being subjected to extreme temp. changes. Engine bolts, for their size, are very much subjected to this, as well as the torquing of how many others? Chris, if I could, I'd buy you an ARP engine kit, but I can't quite afford that this week (Winter Nats on Sunday!!). If it was a small block Chevy for your sisters Caprice wagon, I'd say keep the old bolts, but for your 'stang, I'd go with new ARP's where ever you can. The 12pt SS bolts not only look great, but they make adjustments in tight quarters much easier. Plus, once you buy ARP's, you won't have to have this concern again in the future. Take care, -Chris __________________ Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local RED & WHITE!

02-09-2002, 03:17 AM	#8
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	Actually, now that I think about it, a customer/friend of mine who's wife works locally at ARP, owes me several big favors. Hmmmm. __________________ Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local RED & WHITE!

02-09-2002, 04:40 AM	#9
Mach 1 Registered Member Join Date: May 1999 Location: Georgia Posts: 3,866	lol....well, if you can score some bolt sets, I would make it worth your while...let me know... __________________ 2002 GT 1993 GT (SOLD) '93 Mustang GT RHC member #142

02-09-2002, 05:54 AM	#10
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	I'll make a phone call this afternoon. Remind me if I don't mention it later. Take care, -Chris __________________ Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local RED & WHITE!

02-10-2002, 02:12 AM	#11
1BAD89 Tubbed and Juiced Join Date: Mar 2001 Location: Tulsa, Oklahoma Posts: 1,861	The stock head bolts are 1 time use only. They should not be reused after they have been removed. This is straight from ford. You "could" use them, but you "could" also change your oil at 20k intervals.

02-10-2002, 03:45 AM	#12
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	Dangit! I forgot to make a phone call. __________________ Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local RED & WHITE!

02-10-2002, 10:50 AM	#13
MiracleMax Registered Member Join Date: Apr 1999 Location: Hayes, Va, USA Posts: 798	Yeah I agree, head bolts are cheap, so why not replace them, seems to me the factory bolts now are all torque to yield so they are one shot throw aways. __________________ 2002 5M GT (99% stock) 1991 5M LX (30% stock) patiently awaiting my satin silver 07 Mach 1, and don't forget the shaker

02-11-2002, 01:47 PM	#14
whiterod Registered Member Join Date: Sep 2001 Location: zachary, la Posts: 73	mach 1, my friend and i did an aluminum head swap on his car and reused the same head bolts after we finished he drove it to normal operating temp and went back and retorqued the head bolts there was a slight movement in his bolts. next i performed an aluminum head swap on my car but i used arp head bolts. when i went back to retorque the bolts there was absolutely no movement. He never had problems with his and i never had any with mine since the head swap but i think the fact that there was no movement is just enough cause to replace them, it definately couldn't hurt. __________________ GT-40X(58cc)heads, cobra upper&lower, FMS 65mm TB, 75mm Bullet, 24# injectors, 190 lph fuel pump, moroso cold air intake, BBK 1 5/8 equal length headers, flowmaster cat back, 1.7 cobra rockers, crane 2031, T5Z gear box, centerforce dual friction, mcleod bullet proof bellhousing, 3.55 gears, hurst billet shifter with over 193,000 miles. thanks to all who contributed

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